/*
 * Copyright (c) 2023-2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "authenticatestub_fuzzer.h"

#include <string>
#include <vector>
#include "account_log_wrapper.h"
#include "app_account_authenticator_callback_stub.h"
#include "app_account_manager_service.h"
#include "iapp_account.h"
#include "fuzz_data.h"

using namespace std;
using namespace OHOS::AccountSA;

class MockAuthenticatorCallback final : public AppAccountAuthenticatorCallbackStub {
public:
    OHOS::ErrCode OnResult(int32_t resultCode, const OHOS::AAFwk::Want &result)
    {
        return OHOS::ERR_OK;
    }

    OHOS::ErrCode OnRequestRedirected(const OHOS::AAFwk::Want &request)
    {
        return OHOS::ERR_OK;
    }

    OHOS::ErrCode OnRequestContinued()
    {
        return OHOS::ERR_OK;
    }
    OHOS::ErrCode CallbackEnter([[maybe_unused]] uint32_t code)
    {
        return OHOS::ERR_OK;
    }
    OHOS::ErrCode CallbackExit([[maybe_unused]] uint32_t code, [[maybe_unused]] int32_t result)
    {
        return OHOS::ERR_OK;
    }
};

namespace OHOS {
const std::u16string APPACCOUNT_TOKEN = u"OHOS.AccountSA.IAppAccount";
bool AuthenticateStubFuzzTest(const uint8_t* data, size_t size)
{
    if ((data == nullptr) || (size == 0)) {
        return false;
    }
    FuzzData fuzzData(data, size);
    MessageParcel dataTemp;
    bool isWriteInterfaceToken = fuzzData.GetData<bool>();
    if (isWriteInterfaceToken) {
        if (!dataTemp.WriteInterfaceToken(APPACCOUNT_TOKEN)) {
            return false;
        }
    }
    bool isWriteStringInfo = fuzzData.GetData<bool>();
    if (isWriteStringInfo) {
        AppAccountStringInfo stringInfo;
        stringInfo.name = fuzzData.GenerateString();
        stringInfo.owner = fuzzData.GenerateString();
        stringInfo.authType = fuzzData.GenerateString();
        if (!dataTemp.WriteParcelable(&stringInfo)) {
            return false;
        }
    }
    bool isWriteWant = fuzzData.GetData<bool>();
    if (isWriteWant) {
        AAFwk::Want options;
        if (!dataTemp.WriteParcelable(&options)) {
            return false;
        }
    }
    bool isWriteCallback = fuzzData.GetData<bool>();
    if (isWriteCallback) {
        sptr<IAppAccountAuthenticatorCallback> callback = new (std::nothrow) MockAuthenticatorCallback();
        if (callback == nullptr) {
            ACCOUNT_LOGI("AppAccountStub Authenticate callback is null");
            return false;
        }
        if (!dataTemp.WriteRemoteObject(callback->AsObject())) {
            return false;
        }
    }
    MessageParcel reply;
    MessageOption option;
    uint32_t code = static_cast<uint32_t>(IAppAccountIpcCode::COMMAND_AUTHENTICATE);
    auto appAccountManagerService = std::make_shared<AppAccountManagerService>();
    appAccountManagerService->OnRemoteRequest(code, dataTemp, reply, option);
    return true;
}
}

/* Fuzzer entry point */
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    /* Run your code on data */
    OHOS::AuthenticateStubFuzzTest(data, size);
    return 0;
}

